AZ31镁合金板材高温杯突试验及其数值模拟  

Erichsen test and numerical simulation of AZ31 magnesium alloy sheets at various temperatures

作　　者：何维均[1] 程明[1] 张士宏[1] 董学新[2] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]东北大学轧制与连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《轻合金加工技术》2009年第10期34-38,共5页Light Alloy Fabrication Technology

基　　金：国家自然科学基金项目(50775211)资助

摘　　要：在BCS-50AR万能薄板试验机上,测试连铸连轧AZ31镁合金板在室温、150℃2、00℃、300℃和450℃时的杯突值(IE值)。结果表明,随着温度升高,板材的IE值逐渐增加:在150℃以下,IE值随温度升高而缓慢增加;在150℃以上,IE值随温度的变化明显增加,满足关系式:IEh=-2.08595+0.03648T。在试验基础上模拟了杯突试验,提出并采用减薄率准则讨论了板材厚度对IE值的影响,预测了开裂的部位。结果表明,随着板材厚度增加,IE值随之增加;预测的开裂部位与试验结果一致。The cupping values（IE value） of AZ31 magnesium alloy sheets have been tested on BCS-50AR general sheet metal tester at room temperature,150℃,200 ℃,300℃ and 450℃.The experimental data indicated that the IE value increased gradually with the increase of temperature.Especially,when the temperature was higher than 150℃,the IE value increased rapidly with the ascension of testing temperature and the relationship of IE value and temperature was IEh=-2.085 95＋0.036 48T.In this paper,the erichsen test was simulated by FE code. During the simulation, the reduction rate criterion was proposed to discuss the influence of sheet thickness on the IE value and to predict the fracture initiation position. The result showed that the IE value decreased with the decrease of sheet thickness and the predicted fracture initiation position was in agreement with the experimental results.

关 键 词：AZ31镁合金 杯突值 开裂准则 数值模拟 

分 类 号：TG146.22[一般工业技术—材料科学与工程]